Enclosed industrial luminaire
AssigneeJohns Manville
InventorDaryl D. Sullivan
Life of this patent
Estimating the term…
Abstract
The present invention relates to a luminaire and more particularly a downlight for industrial lighting applications. Energy considerations, lowered ceiling heights, and greater demand for illumination uniformity has resulted in a demand for a versatile and efficient downlight. The present invention anticipates providing a reflector, lamp, and refractive lens construction which utilizes an incrementally painted reflective surface to provide a versatile spacing between each downlight in an array, using the same basic downlight configuration. The refractive lens includes prismatic refractor elements which reshape the downwardly directed conical beam of light to provide even more uniform illumination when used in conjunction with the plurality of such downlights arrayed in an industrial lighting situation.
Claims11
A luminaire for use as a downlight comprising a reflector including an inner reflective surface having a shape corresponding to a surface of revolution and including an opening in the bottom thereof;
- a lamp positioned within said reflector;
- a refractive lens positioned below said lamp and in said opening of said reflector;
- said inner reflective surface is divided into a first reflective portion and a second reflective portion, one of said reflective portions having a metallic specular finish, the remaining portion of said reflective portions having a white finish.
Dependencies are inferred from the claim text.